6 Best Through-the-Wall Air Conditioners for Bedrooms of 2026
We compared six cooling-only wall air conditioners for bedrooms on listed sound level, sleep features, room size and sleeve fit.
By Daniel Brooks
Updated October 19, 2026
A bedroom is the hardest room to fit with a wall air conditioner, because the unit runs while you sleep a few feet away. The right pick is sized for the room rather than oversized, lists a low sound level, and has a sleep mode that eases off overnight. Our list of the best through-the-wall air conditioners for bedrooms compares six cooling-only wall units from 7,800 to 10,000 BTU on listed noise, sleep features, room size and sleeve fit. To browse every model we cover, visit our Cooling-Only Through-the-Wall Air Conditioners page.
Every unit here runs on a standard 115 volt outlet, which is what most bedroom sleeves have. We ranked these through-the-wall air conditioners for bedrooms with noise first, then fit and features.
All Products Compared
| Product | Best For | Cooling Capacity | Room Size | Noise | Notable Feature |
|---|---|---|---|---|---|
| OLMO 8,000 BTU Through-the-Wall Air Conditioner | Overall | 8,300 BTU/h | Small bedrooms | 49.5 dB | Sleeve included, smart kit |
| Keystone 10,000 BTU Wall Air Conditioner and Dehumidifier | Primary bedrooms | 10,000 BTU | Up to 450 sq ft | 50.2 dB | Remote reads bedside temperature |
| LG 7,800 BTU Through the Wall Air Conditioner | Small bedrooms | 7,800 BTU | Up to 330 sq ft | 56 dB | 750 watts, EER 10.7 |
| TCL 10,000 BTU Smart Through-the-Wall Air Conditioner | Smart bedrooms | 10,000 BTU | Up to 450 sq ft | 51 dB | App, Alexa, Google Assistant |
| Whirlpool 10,000 BTU Wall Air Conditioner | Warranty | 10,000 BTU | Up to 450 sq ft | 54 dB | 8-way louvers, Sleep function |
| Frigidaire 8,000 BTU Wall Air Conditioner | Air quality | 8,000 BTU | Up to 350 sq ft | 56 dB | Air ionizer, sleep mode |
| Award | Product | WikiCooling Score About WikiCooling ScoreThe WikiCooling Score is our own rating from 0 to 10, based on the criteria described on our How We Review page. It reflects research, not laboratory measurement, and is never influenced by manufacturers, retailers, or affiliate commissions. Learn more › | |
|---|---|---|---|
| Best Budget |
OLMO 8,000 BTU Through-the-Wall Air Conditioner
|
9.2/10 | Buy |
| Best Overall |
Keystone 10,000 BTU Wall Air Conditioner
|
9.4/10 | Buy |
LG 7,800 BTU Through the Wall Air Conditioner
|
7.6/10 | Buy | |
TCL 10,000 BTU Smart Through-the-Wall Air
|
7.2/10 | Buy | |
| Best Premium |
Whirlpool 10,000 BTU Wall Air Conditioner
|
7.8/10 | Buy |
| Best Value |
Frigidaire 8,000 BTU Wall Air Conditioner
|
7.3/10 | Buy |
OLMO 8,000 BTU Through-the-Wall Air Conditioner
Offering 8,000 BTU of cooling for medium-sized rooms, this through-the-wall unit includes a wall sleeve and supports smart control via app, remote, or voice. Its self-evaporating system reduces maintenance, and at 49.5 dB it runs quietly. Ideal for apartments, bedrooms, or offices needing a permanent cooling solution.
Pros
- Includes wall sleeve
- Smart app, remote, and voice control
- Self-evaporating system
- Quiet operation at 49.5 dB
- Multiple fan speeds
Cons
- Cooling only, no heat mode
- Non-inverter compressor
- Heavy at 80 pounds
Keystone 10,000 BTU Wall Air Conditioner
This through-the-wall air conditioner delivers 10,000 BTU of cooling for rooms up to 450 square feet, with a built-in dehumidifier that removes 2.3 pints of moisture per hour. Its remote control includes a thermostat that senses the temperature at your location for personalized comfort. Ideal for budget-conscious buyers seeking a reliable unit for small to medium spaces.
Pros
- Quiet operation at 50.2 dB
- Smart remote with built-in thermostat
- Energy saver and sleep modes
- Easy through-the-wall installation with trim kit
- Check filter alert for maintenance reminders
Cons
- No heat mode (cooling and dehumidifying only)
- Heavy at 67 pounds for installation
- Low SEER rating (2.82)
LG 7,800 BTU Through the Wall Air Conditioner
This through-the-wall air conditioner from LG offers 7,800 BTU cooling for rooms up to 330 square feet. It features three cooling and fan speeds, a remote control, and an energy saver mode to reduce power consumption. Ideal for bedrooms or offices, it fits standard wall sleeves and includes a trim kit for a finished look.
Pros
- Energy Star certified
- Quiet 56 dB operation
- Auto restart after power outage
- Washable filter with alert
- Remote control included
Cons
- Non-inverter rotary compressor
- Wall sleeve sold separately
- Noise level may be noticeable
TCL 10,000 BTU Smart Through-the-Wall Air
This through-the-wall air conditioner from TCL delivers 10,000 BTU of cooling for rooms up to 450 sq. ft., making it a solid choice for medium-sized living spaces. It includes smart home compatibility with Alexa and Google Assistant, plus a remote and app control for convenient temperature adjustments. The unit also features a dehumidifier mode and washable filter, though the sleeve must be purchased separately.
Pros
- Smart voice control with Alexa and Google Assistant
- Dehumidifier mode for humidity control
- Washable and reusable filter
- Multiple fan speeds and airflow directions
- Energy-saving Sleep and Eco modes
Cons
- Wall sleeve not included
- No inverter technology for variable speed
- Noise level of 51 dB may be noticeable
Whirlpool 10,000 BTU Wall Air Conditioner
Designed for standard wall sleeves, this Whirlpool unit delivers 10,000 BTUs of cooling for spaces up to 450 square feet. It also dehumidifies up to 1.2 pints per hour and includes Eco and Sleep modes for energy savings. Ideal for bedrooms and living rooms where a permanent cooling solution is desired.
Pros
- Cools rooms up to 450 sq ft
- Dehumidifies 1.2 pints per hour
- Programmable 24-hour timer
- Remote control for convenient operation
- Washable, easy-clean filter
Cons
- No inverter technology (on/off cycling)
- 54 dB noise level
- Heavy (64.2 lbs) for installation
Frigidaire 8,000 BTU Wall Air Conditioner
Upgrade your home comfort with this 8,000 BTU wall air conditioner designed to efficiently cool rooms up to 350 square feet. Perfect for bedrooms, living rooms, and apartments requiring a through-the-wall installation, this unit delivers steady, reliable performance while maintaining a clean, built-in appearance. Equipped with three fan speeds and multiple cooling settings, this wall-mounted air conditioner allows you to tailor airflow to your comfort level. The built-in air ionizer helps reduce airborne particles for fresher indoor air, while the reusable, washable filter makes routine maintenance simple and cost-effective. Use the included remote to adjust settings from across the room, activate Sleep Mode for improved nighttime efficiency, or program the 24-hour timer to match your schedule. The 115V plug with extended power cord offers installation flexibility. Ideal for homeowners seeking a wall air conditioner or through-the-wall AC unit, this Frigidaire model combines modern convenience, customizable comfort, and dependable cooling performance for everyday living.
Top 3 Through-the-Wall Air Conditioners for Bedrooms Reviewed
#1 OLMO 8,000 BTU Through-the-Wall Air Conditioner: Best Overall
Why We Picked It
The OLMO 8,000 BTU wall unit lists the lowest sound level in this guide at 49.5 dB, and it has a 4.9 average from 15 ratings. It delivers 8,300 BTU/h of cooling, which in the sizing chart below suits a typical bedroom or nursery of about 300 to 350 square feet, and it runs on a standard 115 volt outlet.
It is also the easiest unit here to install from scratch, because the wall sleeve comes in the box. That matters in a bedroom where the old sleeve is rusted or the wrong size, or where you are cutting a new opening. The built-in smart kit lets you control it from a phone or by voice, so you can cool the room before bedtime, and the remote adds Sleep mode, a timer and auto restart. OLMO also describes a self-evaporating system that reduces dripping outside.
Key Specifications
- Cooling Capacity: 8,300 BTU/h
- Power: 115V, 1 phase, 60Hz
- Noise Level: 49.5 dB
- Refrigerant: R-32
- In the Box: Unit, wall sleeve, remote, smart kit
- Weight: 80 pounds
| Pros | Cons |
|---|---|
|
|
Things to Consider
OLMO does not list wattage or efficiency for this model. If you are replacing a unit in a sleeve that is in good shape, the same unit is also sold without a sleeve.
Best For
This unit is best for small bedrooms and nurseries, especially new openings or replacements where the sleeve also needs replacing.
Check the current price and availability of the OLMO 8,000 BTU Through-the-Wall Air Conditioner on Amazon.
Read our full OLMO 8,000 BTU Through-the-Wall Air Conditioner review.
#2 Keystone 10,000 BTU Wall Air Conditioner and Dehumidifier: Best for Primary Bedrooms
Why We Picked It
The Keystone KSTAT10-1E is the pick for a larger primary bedroom of up to 450 square feet. Keystone lists 50.2 dB, nearly as low as the OLMO despite the extra capacity, and its remote solves a real bedroom problem. It reads the temperature where it sits, shows it on its LCD screen and sends it to the unit every 3 minutes. Keep it on the nightstand, and the unit cools to the temperature at the bed instead of at the warm outside wall.
It also removes up to 2.3 pints of moisture per hour, which helps a muggy bedroom feel cooler. Sleep mode adjusts operation overnight, energy saver mode switches the compressor off with the fan between cycles, and a programmable 24 hour timer handles mornings. It runs on a standard outlet at 1040 watts and has a 5.0 average from 10 ratings.
Key Specifications
- Cooling Capacity: 10,000 BTU
- Room Size: Up to 450 sq ft
- Power: 115 volts, 1040 watts
- Noise Level: 50.2 dB
- Dehumidifying: Up to 2.3 pints per hour
- Weight: 67.2 pounds
| Pros | Cons |
|---|---|
|
|
Things to Consider
Keystone sells the same unit in a 230 volt version. Order the KSTAT10-1E for a standard bedroom outlet.
Best For
This unit is best for primary bedrooms where light sleepers want quiet cooling and an accurate thermostat.
Check the current price and availability of the Keystone 10,000 BTU Wall Air Conditioner and Dehumidifier on Amazon.
Read our full Keystone 10,000 BTU Wall Air Conditioner and Dehumidifier review.
#3 LG 7,800 BTU Through the Wall Air Conditioner: Best for Small Bedrooms
Why We Picked It
The LG LT0816CER is the most proven small bedroom wall unit, with a 3.9 average from 410 ratings. LG rates it for rooms up to 330 square feet, which is the right size for a standard bedroom, a guest room or a nursery, and it draws only 750 watts on a standard outlet. An oversized unit cools a small room in short bursts and leaves it clammy, so a correctly sized unit like this one often feels more comfortable at night.
LG lists an EER of 10.7 with R-32 refrigerant. Energy saver mode keeps the fan running but turns off the compressor once the room is cool, dry mode removes up to 2.1 pints of moisture an hour, and a 24 hour timer and auto restart are included. The unit needs a sleeve from 24.5 to 27 inches wide, sold separately, and the box includes a trim kit, rear grille, insulation foam and a remote.
Key Specifications
- Cooling Capacity: 7,800 BTU
- Room Size: Up to 330 sq ft
- Power: 115 volts, 750 watts
- Efficiency: EER 10.7
- Noise Level: 56 dB
- Weight: 66 pounds
| Pros | Cons |
|---|---|
|
|
Things to Consider
Its listed sound level is higher than the OLMO and Keystone. Run it on the lowest fan speed with energy saver mode for the quietest nights.
Best For
This unit is best for small bedrooms, guest rooms and nurseries up to 330 square feet.
Check the current price and availability of the LG 7,800 BTU Through the Wall Air Conditioner on Amazon.
Read our full LG 7,800 BTU Through the Wall Air Conditioner review.
Other Models Worth Considering
TCL 10,000 BTU Smart Through-the-Wall Air Conditioner (H10T9E1-A). A 10,000 BTU unit for spaces up to 450 square feet with a listed 51 dB and Sleep mode, plus TCL Home app, Alexa and Google Assistant control for pre-cooling the room before bed. It needs a 26 by 20 by 15.75 inch sleeve, not included.
Whirlpool 10,000 BTU Wall Air Conditioner (WHAT101-1BW). A 10,000 BTU unit for spaces up to 450 square feet with a listed 54 dB, a Sleep function, 8-way directional louvers to keep air off the bed, and a 2 year limited warranty. It fits sleeves from 24.5 to 27 inches wide and includes a trim kit and rear grille.
Frigidaire 8,000 BTU Wall Air Conditioner (FHTC083WB1). An 8,000 BTU unit for rooms up to 350 square feet that draws 810 watts, with a built-in air ionizer, three fan speeds, sleep mode and a 24 hour timer. Frigidaire lists 56 dB.
What to Expect from Through-the-Wall Air Conditioners for Bedrooms
All six units here use conventional compressors, so you will hear the compressor start and stop during the night. Lower listed sound levels, sleep modes and correct sizing all help. Bedroom units should be sized to the room, not to the hottest day of the year, because a unit that is too large short-cycles and leaves humidity behind.
For other needs, see our guides to 10,000 BTU through-the-wall air conditioners and smart through-the-wall air conditioners. The product cards show the current price for each unit.
How to Choose a Through-the-Wall Air Conditioner for a Bedroom
Size It to the Bedroom
ENERGY STAR publishes this general guide for sizing a room air conditioner by floor area:
| Room Size (sq ft) | Cooling Capacity (BTU/hr) |
|---|---|
| 100 to 150 | 5,000 |
| 150 to 250 | 6,000 |
| 250 to 300 | 7,000 |
| 300 to 350 | 8,000 |
| 350 to 400 | 9,000 |
| 400 to 450 | 10,000 |
| 450 to 550 | 12,000 |
| 550 to 700 | 14,000 |
| 700 to 1,000 | 18,000 |
Reduce capacity by 10 percent for a heavily shaded room, increase it by 10 percent for a very sunny room, add 600 BTU for each regular occupant beyond two, and add 4,000 BTU if the unit cools a kitchen. Source: ENERGY STAR.
Compare Listed Sound Levels
The OLMO, Keystone and TCL list the lowest figures here. Every decibel counts at night, and the gap between the quietest and loudest units in this guide is several decibels.
Look for Sleep Features
Every pick has a sleep or energy saving mode. The Keystone’s remote and the TCL’s app add useful extras: an accurate bedside temperature reading, and the ability to start cooling before you go to bed.
Aim the Airflow
Mount the unit so it does not blow straight onto the bed. The Whirlpool’s 8-way louvers and the 4-way deflection on the others help direct air across the room instead.
How We Evaluate Through-the-Wall Air Conditioners for Bedrooms
We rank wall air conditioners on manufacturer specifications, listing details and aggregated buyer ratings. For this list we kept cooling-only through-the-wall units sized for bedrooms that run on a standard outlet. We weighed listed sound level first, then room coverage and buyer feedback, giving more weight to ratings from larger numbers of buyers, then compared sleep features, sleeve fit and controls.
Frequently Asked Questions
What is the quietest through-the-wall air conditioner for a bedroom?
The OLMO 8,000 BTU unit lists 49.5 dB, the lowest here. The Keystone 10,000 BTU unit lists 50.2 dB.
What size wall unit do I need for a bedroom?
For a typical bedroom, an 8,000 BTU class unit is usually enough. LG rates its 7,800 BTU unit for rooms up to 330 sq ft. For a primary bedroom up to 450 sq ft, choose a 10,000 BTU unit.
Which bedroom wall unit includes a sleeve?
The OLMO 8,000 BTU unit includes a wall sleeve.
Can I control a bedroom wall unit from my phone?
Yes, with the OLMO or the TCL, which both offer app control.
Final Verdict
The OLMO 8,000 BTU Through-the-Wall Air Conditioner is the best through-the-wall air conditioner for most bedrooms, with the lowest listed sound level here, a sleeve in the box and smart control. For a larger primary bedroom, choose the Keystone 10,000 BTU Wall Air Conditioner and Dehumidifier. For a small bedroom with an existing sleeve, the LG 7,800 BTU Through the Wall Air Conditioner is efficient and proven.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.